Pyrrole synthesis
- Product Name:Pyrrole
- CAS Number:109-97-7
- Molecular formula:C4H5N
- Molecular Weight:67.09
110-00-9
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$10.00/25g
109-97-7
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$9.00/5G
Yield:109-97-7 99.8 %Chromat.
Reaction Conditions:
with ammonia at 320 - 360;Reagent/catalyst;Temperature;
Steps:
4
The SO42-/TiO2-SnO2-Al2O3 type solid attached to a fixed bed, and with the airspeed at 0.075g / min introduced nitrogen for deaeration; when then fixed bed was heated to 320 ° C, then into the fixed bed passing ammonia, water vapor for 10min, at this time the fixed bed internal temperature was 360 ° C, and then into the fixed bed pass furan. The molar ratio of furan, ammonia and water vapor is 1: 8: 11. The total airspeed of furan, ammonia and water vapor is 1g / min; At the end of the reaction, stop the inletting of furan, and then continue to pass ammonia, water vapor for 10min; The reaction mixture is passed into a condensing unit at a temperature of -20 ° C; The mixed product is condensed and liquefied to a mixed liquid, then , added sodium hydroxide to adjust the pH to 12; Static stratification to obtain upper layer of the mixture and the lower lye; The distillation of the upper layer mixture was carried out at 80 ° C and recovering the distillated furan for recycling to obtain crude pyrrole; after the lower lye was concentrated , it was then recycled. The crude pyrrole was distilled to obtain pyrrole.
References:
CN106831527,2017,A Location in patent:Page/Page column 5-8
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